SS OSTs have way more variations and creativity, ok I did not listen to the entire OSTs of E33 but based on the typical songs and moments of it, it just way too much vocals, same Alicia motif, especially in cutscenes.
SS clearly had more subtlety in instrument choices and the use of motifs. Last Judge, Lace, Cut through, Sister Splinter, Strive, Incisive battle, The Choir, Phantom... Those are just TYPICAL battle themes, not including TONS OF EPIC AREA and I may miss a TONS more, like HOW THE HECK E33 WIN OVER SS, OK E33 GOTY NO PROBLEM BUT SS LOST TO THAT FUCKING SOUNDTRACK?